Posted January 4, 20232 yr I imported a bunch of cells from China (Know someobody that knows how to do this right and build them) 280amph 51.2V Will the Deye vs Sunsynk work with these batteries? Does anybody have any experience? Edited January 4, 20232 yr by lavaland
January 4, 20232 yr Yes they will, but depends on the BMS that you will use. Check out @Raj35he has done just this with a 5kW Sunsynk.
January 6, 20232 yr On 2023/01/04 at 5:20 PM, lavaland said: I imported a bunch of cells from China (Know someobody that knows how to do this right and build them) 280amph 51.2V Will the Deye vs Sunsynk work with these batteries? Does anybody have any experience? Seplos BMS
January 6, 20232 yr It also depends what you want to draw and charge at some bms have limitations, with the JBD I'm currently using its quite strong I've put it to around 200amp discharge and 100amp charge, I know the say Seplos can communicate, but if you set the voltage right you don't really need communication that just my point of view.
January 6, 20232 yr 9 minutes ago, Raj35 said: It also depends what you want to draw and charge at some bms have limitations, with the JBD I'm currently using its quite strong I've put it to around 200amp discharge and 100amp charge, I know the say Seplos can communicate, but if you set the voltage right you don't really need communication that just my point of view. Can you set absorption time on your inverter using voltage?
January 7, 20232 yr 13 hours ago, Chris_S said: Can you set absorption time on your inverter using voltage? No I control via SA
January 7, 20232 yr 5 hours ago, Raj35 said: No I control via SA So your BMS connects to SA via RS485 to usb and then SA connects to inverter via sunsynk WiFi dongle? Do you mind showing a pic of your inverter battery settings?
January 7, 20232 yr 5 hours ago, Chris_S said: So your BMS connects to SA via RS485 to usb and then SA connects to inverter via sunsynk WiFi dongle? Do you mind showing a pic of your inverter battery settings? This is on SA
January 7, 20232 yr 5 hours ago, Raj35 said: This is on SA Does the JBD not communicate via SA to your inverter so you can set the battery as lithium?
January 9, 20232 yr 20 hours ago, Raj35 said: It does but on the inverter it shows AGM. Is your float voltage not set too high? Lithium cells normally float around 3.35V
January 9, 20232 yr 1 hour ago, Chris_S said: Is your float voltage not set too high? Lithium cells normally float around 3.35V @Chris_S they dont really float as to AGM so they range is 3.2 to 3.65V per cell. 2.5V end voltage, so if you have a 16s end voltage would be 40v and 58.4 max charge voltage as per spec sheet.
January 9, 20232 yr 12 minutes ago, Raj35 said: @Chris_S they dont really float as to AGM so they range is 3.2 to 3.65V per cell. 2.5V end voltage, so if you have a 16s end voltage would be 40v and 58.4 max charge voltage as per spec sheet. If you charging to 3.45V for example after absorption at that voltage they should be allowed to drop naturally to 3.3V it does not affect your SOC. There's a good video on off grid garage about absorption and float.
January 9, 20232 yr 8 minutes ago, Chris_S said: If you charging to 3.45V for example after absorption at that voltage they should be allowed to drop naturally to 3.3V it does not affect your SOC. There's a good video on off grid garage about absorption and float. So because I don't charge them up to 58.4v I set them like that, thanks Andies has some nice videos out there and alot to be learned. In fact I followed his advice on the bus bar. Edited January 9, 20232 yr by Raj35
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